Bug 2218604 (CVE-2023-3389) - CVE-2023-3389 kernel: Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer
Summary: CVE-2023-3389 kernel: Racing a io_uring cancel poll request with a linked tim...
Keywords:
Status: NEW
Alias: CVE-2023-3389
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact: Murphy Zhou
URL:
Whiteboard:
Depends On: 2218610 2218611 2220934 2220935
Blocks: 2218602
TreeView+ depends on / blocked
 
Reported: 2023-06-29 15:33 UTC by Patrick Del Bello
Modified: 2023-11-03 09:56 UTC (History)
46 users (show)

Fixed In Version:
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Doc Text:
A use-after-free flaw was found in the Linux kernel’s io_uring functionality. This flaw allows a local user to crash the system.
Clone Of:
Environment:
Last Closed:
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Description Patrick Del Bello 2023-06-29 15:33:19 UTC 
A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation.

Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer.

We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).



https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.15.y&id=0e388fce7aec40992eadee654193cad345d62663
https://kernel.dance/4716c73b188566865bdd79c3a6709696a224ac04
https://kernel.dance/0e388fce7aec40992eadee654193cad345d62663
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=4716c73b188566865bdd79c3a6709696a224ac04
https://kernel.dance/ef7dfac51d8ed961b742218f526bd589f3900a59
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef7dfac51d8ed961b742218f526bd589f3900a59
Comment 4 Alex 2023-07-06 14:54:36 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2220934]
Comment 7 Justin M. Forbes 2023-07-18 18:21:22 UTC 
This was fixed for Fedora with the 6.0 kernel rebases.
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